MacLeod & Boynton (1979) chromaticity coordinates based on the Stockman and Sharpe (2000) cone fundamentals

0.1 nm steps	1 nm steps	5 nm steps

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Data key

Columns

1. Wavelength (nm)
2. r_MB(l) chromaticity coordinate
3. g_MB(l) chromaticity coordinate
4. b_MB(l) chromaticity coordinate

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Notes

The MacLeod & Boynton chromaticity coordinates, r, g and b are based on the Stockman and Sharpe cone fundamentals, L, M and S, and the Stockman and Sharpe, V*(l) at 0.1, 1 or 5 nm steps.

The MacLeod-Boynton chromaticity coordinates are defined as:

,

where , and are the three cone spectral sensitivities scaled so that , and peaks at one (at 417.7 nm).

    In a space where Cartesian coordinates represent the excitations of the three cone types involved in color vision, a plane of constant luminance provides a chromaticity diagram in which excitation of each cone type (at constant luminance) is represented by a linear scale (horizontal or vertical), and in which the center-of-gravity rule applies with weights proportional to luminance (see p. 1183 of MacLeod & Boynton, 1979).

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References

MacLeod, D. I. A. & Boynton, R. M. (1979). Chromaticity diagram showing cone excitation by stimuli of equal luminance. Journal of the Optical Society of America, 69(8), 1183-1186.

Stockman, A., & Sharpe, L. T. (2000). Spectral sensitivities of the middle- and long-wavelength sensitive cones derived from measurements in observers of known genotype. Vision Research, 40, 1711-1737.

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